Luke 6:37 

Do not judge (others self-righteously), and you will not be judged; do not condemn (others when you are guilty and unrepentant), and you will not be condemned (for your hypocrisy); pardon (others when they truly repent and change), and you will be pardoned (when you truly repent and change).

The more time we spend keeping our own houses in order, the less interesting it is to see what is going on with the neighbors. Our own home will have enough sin and imperfection to keep us busy. When we examine ourselves under the light of the gospel, we fully realize we have no moral high ground to judge others.